Book excerpt: Traditionally, natural antioxidants from herbs and foods have played very important roles in medicine and health protection. In recent years, great progress has been achieved in studies on the effects and mechanisms of natural antioxidants, as well as on the relationship between antioxidants and human health. But the molecular mechanisms of natural antioxidants have yet to be deeply investigated. The academic discussions at this symposium, held in Beijing, China, in June 1995, have provided further insight into the effects and mechanisms of antioxidants; these may contribute to human health and the improvement of the lifestyle of mankind.